It is a figure of speech. Obviously they hadn't actually been on the verge of cutting each other's throats, it's a fancy way of saying they were all very angry and couldn't stand each other. The author's purpose was to imply that before something happened, they were very angry and unable to stand each other.
You can expand your vocabulary to make you sound smarter. reading books also helps too
Answer:
C. On a sunny day in the park, children were fascinated as they watched a man juggle colorful bowling pins.
Explanation:
